Anggraini, Rachel Natalie (2026) Peningkatan Selektivitas Adsorpsi CO2/CH4 pada Zeolit A-4 Teraktivasi NaOH. Undergraduate thesis, Politeknik Negeri Jember.
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Abstract
Biogas is a renewable energy source that contains methane (CH₄) and carbon dioxide (CO₂). High CO₂ content reduces the heating value and quality of biogas, therefore a purification process is needed. This study aims to enchange for biogas purification using NaOH-modified Zeolite 4A. Zeolite was chosen because it has a porous structure and strong affinity toward CO₂ molecules. The research used an experimental method with NaOH activation concentrations of 0.5 M, 1 M, and 2 M. The adsorption process was carried out using different CO₂ concentrations (1506 ppm, 3193 ppm, 4879 ppm, and 8248 ppm) with a constant CH₄ concentration of 496 ppm. Gas adsorption was analyzed using Gas Chromatography (GC) after 4 hours of incubation at 25°C. The results showed that NaOH activation increased the adsorption capacity of CO₂ compared to untreated zeolite. The highest CO₂ adsorption was achieved by zeolite activated with 2 M NaOH at 8248 ppm CO₂ concentration. In contrast, CH₄ adsorption decreased after activation because the zeolite surface became more selective toward CO₂. The selectivity of CO₂/CH₄ adsorption also increased with higher CO₂ concentration and stronger NaOH activation.NaOH-modified Zeolite 4A showed good potential as an adsorbent for biogas purification by improving CO₂ adsorption and CO₂/CH₄ selectivity. However, the ANOVA test results showed that there were no significant differences due to factors A and B, as well as their interaction. Key words: Adsorption, Biogas, Carbon Dioxide, Metane, Selectivity.
| Item Type: | Thesis (Undergraduate) | ||||||
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| Uncontrolled Keywords: | Adsorption, Biogas, Carbon Dioxide, Metane, Selectivity. | ||||||
| Subjects: | 410 - Rumpun Ilmu Teknik > 420 - Teknik Sipil dan Perencanaan Tata Ruang > 422 - Teknik Lingkungan 410 - Rumpun Ilmu Teknik > 430 - Ilmu Keteknikan Industri > 433 - Teknik Kimia 410 - Rumpun Ilmu Teknik > 430 - Ilmu Keteknikan Industri > 435 - Teknik Industri 410 - Rumpun Ilmu Teknik > 430 - Ilmu Keteknikan Industri > 442 - Teknik Fisika 410 - Rumpun Ilmu Teknik > 430 - Ilmu Keteknikan Industri > 443 - Teknik Enerji |
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| Divisions: | Jurusan Teknik > Prodi D4 Teknik Energi Terbarukan > Tugas Akhir | ||||||
| Depositing User: | Rachel Natalie Anggraini | ||||||
| Date Deposited: | 24 Jun 2026 01:32 | ||||||
| Last Modified: | 24 Jun 2026 01:33 | ||||||
| URI: | https://sipora.polije.ac.id/id/eprint/56798 |
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